G/TBT/N/USA/1987/Add.1  
 
23 April 2024  
(24-3333) Page: 1/2 
Committee on Technical Barriers to Trade  Original: English  
 
 
NOTIFICATION  
Addendum  
The following communication , dated  23 April 2024, is being circulated at the request of the 
delegation of the United States of America . 
 
_______________  
 
 
Title:  Greenhouse Gas Emissions Standards for Heavy -Duty Vehicles - Phase 3  
 
Reason for Addendum:  
[ ] Comment period changed - date:   
[ ] Notified measure adopted - date:  
[X] Notified measure published - date: 22 April 2024  
[X] Notified measure enters into force - date: 21 June 2024  
[X] Text of final measure available from1:  
89 Federal Register (FR) 29440, Title 40 Code of Federal Regulations (CFR) Parts 86, 
1036, 1037, 1039, 1054, and 1065:  
https://www.govinfo.gov/content/pkg/FR -2024-04-22/html/2024 -06809.htm  
https://www.govinfo.gov/content/pkg/FR -2024-04-22/pdf/2024 -06809.pdf  
https://members.wto.org/crnattachments/2024/TBT/USA/final_measure/24_02754_00
_e.pdf  
[ ] Notified measure withdrawn or revoked - date:  
Relevant symbol if measure re -notified:   
[ ] Content or scope of notified measure changed  and text available from1:  
New deadline for comments (if applicable):   
[ ] Interpretive guidance issued and text available from1:  
[ ] Other:  
 
Description:  The Environmental Protection Agency (EPA) is promulgating new greenhouse gas 
(GHG) emissions standards for model year (MY) 2032 and later heavy -duty highway vehicles that 
phase in starting as early MY 2027 for certain vehicle categories. The phase in revises certain MY 
2027 GHG standards that were established previously under EPA's Greenhouse Gas Emissions and 
Fuel Efficiency Standards for Medium - and Heavy -Duty Engines and Vehicles --Phase 2 rule (" HD 
GHG Phase 2 "). This document also updates discrete elements of the Averaging Banking and Trading 
program, including providing additional flexibilities for manufacturers to support the implementation 
of the Phase 3 program balanced by limi ting the availability of certain advanced technology credits 
 
1 This information can be provided by including a website address, a pdf attachment, or other 
information on where the text of the final /modified  measure and/or interpretive guidance can be obtained.  G/TBT/N/USA/1987/Add.1  
 
- 2 - 
 
  initially established under the HD GHG Phase 2 rule. EPA is also adding warranty requirements for 
batteries and other components of zero -emission vehicles and requiring customer -facing battery 
state-of- health monitors for plug -in hybrid and battery electric vehicles. In this action, we are also 
finalizing additional revisions, including clarifying and editorial amendments to certain highway 
heavy -duty vehicle provisions and certain test procedure s for heavy -duty engines.  
Title 40  Code of Federal Regulations (CFR) Parts 86, 1036, 1037, 1039, 1054, and 1065 
This final rule is effective on 21 June 2024. The incorporation by reference of certain material listed 
in this rule is approved by the Director of the Federal Re gister beginning 21 June 2024. The 
incorporation by reference of certain other material listed in this rule was previously approved by 
the Director of the Federal Register as of 27 March 2023.  
The final rule and the notice of proposed rulemaking notified a s G/TBT/N/USA/1987  are identified 
by Docket Number EPA -HQ-OAR-2022-0985. The Docket Folder is available on Regulations.gov at 
https://www.regulations.gov/docket/EPA -HQ-OAR-2022-0985/document  and provides access to 
primary and supporting documents as well as comments received. Documents are also accessible 
from Regulations.gov  by searching the Docket Number.  
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